#install express-generator. https://code.visualstudio.com/tutorials/nodejs-deployment/express
npm install -g express-generator
cd ~
mkdir jenkinsdocker
cd ~/jenkinsdocker
# tell express-generator to use pug template engine(know as jade before) and create a .gitignor file.
express -view pug --git
# create a git repository under your github account, then run the command below
cd ~/jenkinsdocker
git init
git add -A
git commit -m "first commit"
git remote add origin https://github.com/[your git hub account]/jenkinsdocker.git
git push -u origin master
Dockerfile
# use a node base image
FROM node:7-onbuild
# set maintainer
LABEL maintainer "[email protected]"
# set health check
HEALTHCHECK --interval=5s\
--timeout=5s\
CMD curl -f http://127.0.0.1:3000|| exit 1
# tell docker which port to expose
EXPOSE 3000
Since it use the official node base image onbuild, it inherits the following actions.
- Copy all the files in the current directory to /usr/src/app folder inside the container image
- Run npm install to install any dependencies for the app
- Specify npm start as the command when the container starts, similar to the Docker Command "Run npm start"
Create pipeline configuration inside the Jenkinsfile, so it becomes part of the application code. Replace where lujasper is with your docker hub user name. You will need to create a docker hub repository first at hub.docker.com. Jenkinsdocker is the project name.
Jenkinsfile
node{
def app
stage('Clone Repository'){
/* let's make sure we have the repository cloned to our workspace */
checkout scm
}
stage('Build image'){
/* Build docker image, similar to docker build on the command line */
app = docker.build("lujasper/devops:jenkinsdocker")
}
stage('Test image')
{
/* put npm test command here once configured test */
app.inside{
sh 'echo "Tests passed"'
}
}
stage('Push image')
{
/*Using docker with pipeline https://jenkins.io/doc/book/pipeline/docker/*/
docker.withRegistry('https://registry.hub.docker.com','docker-hub-credentials'){
/*app.push("${env.BUILD_NUMBER}")
app.push("latest")
add this image to lujasper/devops repository, tag it as jenkinsdocker
*/
app.push("jenkinsdocker")
}
}
}
Run the jenkins docker image build lujasper/devops:jenkins. Learn how to build it, please follow the steps here. You may noticed that the local storage is involved to persist the configuration you performed. You must make sure the path "c:/devops/jenkins" is valid.
mkdir c:/devops/jenkins
docker run -d -v c:/devops/jenkins:/var/jenkins_home -p 8080:8080 -p 50000:50000 --name jenkins lujasper/devops:jenkins
docker exec -ti jenkins bash
- Click Credentials in the left menu and System once it appears. Then click Global credentials at the right and you will see the screen below.Change lujasper to your docker hub account name.
- Create Jenkin pipeline for the project jenkinsdocker. At Jenkins home page, click New Item and select Pipeline.
Description. Add any description for this build.
Build triggers. Select Poll SCM and set it to check check sum every 5 min.
Pipeline. Definition: Build, test, create docker image and push to docker hub.
Script Path. Put Jenkinsfile as it is under your project folder. The pipeline will pick it up and run the scripts.
Save the pipeline. - Once saved, check out the build log. Hover over the Green or Red block and select Logs icon to view the details.
- If build is successful, the image should occur in the docker hub.
docker run -d -p 3000:3000 --name jenkinsdocker lujasper/devops:jenkinsdocker
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